2004 Hyundai Sonata: Brake light diagnosis

Question

The neighbor's brake's lights won't turn off: the fuse has to be pulled to avoid draining the battery.  He asked me to check the fuse and it tested good (continuity test).

What is the procedure to test / isolate fault?
Is there a brake sensor that could be 'stuck'?

Will do my best to answer any questions that aid diagnosis.

Solar Mike · Answer

Most common fail is the switch either failed inside or stuck on with dirt.
Less common but has happened is a short with another live wire but then pulling the fuse would not be the cure.
So, check the switch on the brake pedal.

2004 Hyundai Sonata: Brake light diagnosis

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